Convertible brush buster-bulldozer moldboard



Oct. 22, 1940.

-T. P.,FLYNN ET Al.. CONVERTIBLE lBRUSH BUSTR-BULVLD0ZER IOLDBOARD Filed July -9'. 179:58 4 sneetsfsheet 5 IN VENTORS ODORE I.

wow BY A TTORNEYS.

Patented Oct. 22, 1.940

UNITED STATES CONVERTIBLE BRUSH BUSTER-BULLDOZER MOLDBOARD Theodore P. Flynn and Raymond E. Neils, Portland, Oreg.; dedicated to the free use of the People of the United States of America Application July 9, 1938i, SerialNo. 213,344

3 Claims.

(Granted under the act of March 3,188.3, as amended April 30, 1928; 370 0. G. 757) This application is made under the act of March 3, 1883, as amended by the act of April 30, 1 928, and the invention herein described, if patented, may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment to us of any royalty thereon.

We hereby dedicate the invention herein described to the free use of the People of the United States of America to take effect on the granting of a patent to us.

This invention relates to moldboards or Abla/des for mounting on the front end of tractors and road graders and more specifically to a folding or convertible type of moldboard which can be fastened on the front end of any conventional bulldozer frame or can be mounted on road l graders.

The main object of the invention. is to provide a split folding type of moldboard in two separate halves with cutting edges attached, Vwhich will sertie as a forward V-type blade, as a reversed V to forma vscoop-like blade, and as a straight bulldozer or grading blade all combined in one main blade or moldboard.

Combining these three important operating features in one convertible moldboard or blade veliminates the necessity for three entirely separate units, because of the fact that heretofore V-type, bulldozer or grader blades have been built as entirely separate units necessitating constructing, attaching, detaching, and transporting them as separate units wherever the type of work is such as to require the features of a V-type, re-

versed V-type or straight bulldozer blade.

Furthermore, this invention eliminates two ex'- tra blades now necessary on present conventional equipment of this type when it. is necessary to perform any of the distinctly different types of work which might be done by a V-type blade, bulldozer blade, -or scoop. In addition to the economy of completely eliminating two extra blades for any of the types of work as well as the transportation and inconvenience of moving these extra blades under adverse conditions in forests, our combination of an adjustable folding blade affords further economy in that it does not have to be removed at any time from the bulldozer or Aroad grader frame because it is converted quickly into any one of its possible uses. This feature eliminates the labor and expense of completely removing, exchanging, and replacing three separate types of blades such as in the case where the present conventional, separate unit- The following description considered together with accompanying drawings will disclose this invention more fully, its construction and operation of parts, and further objects and advantages thereof will be apparent. 5

In the drawings:

Figure 1 is a plan view showing the brush busting arrangement with bulldozing arrangement in phantom.l

Figure 2 is a side view of brush busting ar- 10 rangement as shown by Figure 1.

Figure 3 is a plan view, showing the angle bulldozing arrangement with moldboard arrangement in phantom.

Figure 4 is a side view of angle bulldozing ar- 15 rangement as shown by Figure 3.

Figure 5 is a vertical cross section along the line A,-A of Figure 1.

Figure is a vertical cross section along the line B--B 0f Figure '1. s

Figure '7 is a vertical cross section along the line C-C of Figure 1.

Figure 8 is a plan view, showing straight bulldozing arrangement with the brush busting arrangement in phantom. 25

Figure 9 is aside view of straight bulldozing arrangement as shown by Figure 8.

Figure 10 is a plan view,- showing scooping ar-v rangement. A

Figure 11 is al front view of scooping arrange- 30 ment as shown by AFigure 10.

.The convertible brush buster and bulldozer moldboard comprises moldboards I and 2, nose- -piece 3, cutting edges 4,14, nosepiece locking pins 5, 5, nosepiece main pin 6, moldboards end 35 pins "I, 9, and 20, moldboards locking pin 8, and supporting bridges I8, I9, and 2l.

In the brush busting positionas shown by Figure 1, the moldboards-I and 2, at an angle of 40 to 45, are securely held to the A-frame or moldboard mounting bracket of the tractor by pins 1 and 9 passing through top horizontal flange members I4 and .I6 of moldboards I and 2, respectively, then through special lugs III and II, vand lugs opposite, such as lug IUA opposite lug II), which are attached by conventional method to the A-frame, then through bottom horlzontal flange members I5 and I'I of moldboards I and 2. In addition toend pins 'I and 9-there is a hinge pin 8, which passes through anges 50 I4 'and I6, then through `a conventional type of T head or forwardly extending central headpiece 8A which is a standard part of the A-frame and finally through flanges l5 and II. These three fastening points form a triangle resisting indethrough flanges I4, I5, I6, and I1 which are inserted between these nose piece lugs, making an additional connection between moldboards I and 2.` Pins 5, 5 are side anchors for nose piece 3, passing through lugs I2, I2 and I2A, I2A of both moldboards and lugs I3 and I3A of nose piece 3. This interlocking of V-point members makes a construction that is as rigid as though it were fabricated'as an integral part.

When changing to the angle bulldozing position (approximately 58 to 62 with the longitudinal axis of the tractor) as shown by Figure 3, it is necessary to rst remove pins 5, 5, and 6, then 8 and finally 1 and 9. Pin 1 is moved to -the other hole location of lugs I IJ and IIIA as shown by 1A; pin 8 retains its same location on the A-frame, but passes through holes in moldboard I and 2 used by pin 6 when in brush busting position shownA in Figure 1. As it is necessary to support ,the 'outer end of moldboard 2, a bridge I8 is used with one end held to the moldboard by pin 9 and the other end fastened with pin 6 through the otherhole of lug II. Moldboard I is held in rigid position by pins 1A and 8, and moldboard 2 is held rigidly in the same horizontal plane as moldboard I, by pins 6, 8, and 9, thus making an angle bulldozing Enit comparable with the conventional one-piece ype.

Flanges I 4 and I5, Figure 5, are spaced to permit them to pass freely over flanges I6 and I1, and flanges IE and I1 are spaced so as to pass freely over top and. bottomsurfaces of the A- frame. 'This arrangement permits the angling of the blade on either side of the vertical center line of pin 8, and bridge I8 serves the same purpose on either side.

For straight bulldozing position pin 8 retains the position and connections as shown in Figure 3. Moldboards I and 2 are moved around pin 8 until they both reach the same horizontal plane 90 to the longitudinal center line of the tractor, as shown in Figure 8; Two bridges I9, I9 which are shorter than I8 are the end supports for moldboards I and 2. One additional pin 20 is needed for this arrangement.

For the scooping position, a special T head 24 is substituted for the headpiece 3 to accommodate a new position for the pin 8 and an additional pin 23. Also a new connecting member 22, shown in Figurev 10, is required to make the scooping face continuous. Two bridges 2|, 2l of lengths different than either I8 or I9, support the ends of the moldboards.

Having thus described our invention, we claim:

l. In combination with a tractor having a rigid frame, a moldboard mounting bracket on said frame, said bracket having a forwardly extending central headpiece, a pair of symmetrical moldboards disposed laterally adjacent to each other in a forward V relation in front of said bracket,

a pair of horizontal'fianges on the back of each Y of said moldboards, means for removably interlocking the adjacent ends of said flanges and securing them to said headpiece, means for removably securing the opposite ends of said anges to said bracket, and a nosepiece removably secured to and bridging the forward adjacent ends of said moldboard.

2. In combination with a tractor having a rigid frame, a moldboard mounting bracket on said frame, said bracket having a forwardly extending central headpiece, a` pair of symmetrical moldboards disposed adjacent to each other laterally in a rearward V relation in front of said bracket, a pair of horizontal flanges on the back of each of said moldboards, means for removably securing the adjacent ends of said ages to said headpiece, means for removably securing the oplpositeencls of said flanges to said bracket, and a connecting member removably secured to and 'bridging the adjacent ends of said moldboard.

3. In combination with a tractor having a rigid frame, a moldboard mounting bracket on said frame, said bracket having a forwardly extending central headpiece, said headpiece having perforations therethrough, a pairof symmetrical moldboards in front of said bracket laterally adjacent each other, said moldboards being adapted to be disposed in different angular positions, a pair of horizontal flanges on the back of each of said moldboards, said flanges having each perforations therethrough adapted to register with perforations of said central headpiece when said moldboards are in dierent angular positions, removable bolts associated with'said perforations for securing the adjacent ends of said flanges to said headpiece, means for bracing the outer ends of said flanges to said bracket. and means for removably securing different connecting members across the adjacent ends of said moldboards for different angular positions of said moldboards.

THEODORE P. FLYNN. RAYMOND E. NEllS. 

